Cold Air Kit
10-09-2012, 04:26 PM
#32
A common misconception is equating octane to power. Octane is a fuel additive that raises the detonation level only. Higher detonation level, assuming the car's ECU is capable of it will produce a higher combustion rate (higher fuel to air ratio) without undesirable detonation.
10-09-2012, 04:35 PM
#33
If the gorgeous CF airbox has similar dimensions to the stock airbox and/or no other improvements are made, then there will be no performance advantage.
The dimensions of the airbox, the size of the inlet opening(s), and the size of snorkel(s) are directly related to the volume of fresh air needed to produce the desired engine characteristics (torque, HP, sound, etc.). Likewise, the factory exhaust system is sized to match the volume of combustion gases. Neither the intake system or the exhaust system are intentionally undersized or oversized if they are properly designed to produce the desired engine characteristics.
Many Rennlisters, including me, have found that the engine characteristics (torque, HP, and sound) can be improved by increasing the dimensions and efficiency of the intake system (airbox, air filter, throttle body, plenum) and increasing the dimensions and efficiency of the exhaust system (headers, cats, mufflers). Enabling the engine to suck in more fresh air and to blow out more exhaust seems to improve the torque, HP, and sound of these engines.
.
The dimensions of the airbox, the size of the inlet opening(s), and the size of snorkel(s) are directly related to the volume of fresh air needed to produce the desired engine characteristics (torque, HP, sound, etc.). Likewise, the factory exhaust system is sized to match the volume of combustion gases. Neither the intake system or the exhaust system are intentionally undersized or oversized if they are properly designed to produce the desired engine characteristics.
Many Rennlisters, including me, have found that the engine characteristics (torque, HP, and sound) can be improved by increasing the dimensions and efficiency of the intake system (airbox, air filter, throttle body, plenum) and increasing the dimensions and efficiency of the exhaust system (headers, cats, mufflers). Enabling the engine to suck in more fresh air and to blow out more exhaust seems to improve the torque, HP, and sound of these engines.
.
10-09-2012, 05:41 PM
#34
Instructor
Join Date: Oct 2012
Location: Sacramento, CA
Posts: 212
Likes: 0
Received 0 Likes
on
0 Posts
I can tell you from firsthand exppericne there is HUGE Power rub using the crap 91 Octane vs. higher octane gas,
As I reported earlier, I always used 94 octane, 0% ethanol (that's available locally), whenever I travel south to US and use the 10% ethanol, 91-92 Octane, there is a noticable power down... 100% noticable, even engine sound is different!
As I reported earlier, I always used 94 octane, 0% ethanol (that's available locally), whenever I travel south to US and use the 10% ethanol, 91-92 Octane, there is a noticable power down... 100% noticable, even engine sound is different!
10-09-2012, 07:22 PM
#35
Rennlist Member
I don't care if they have 10% ethanol and mandate its sales, BUT at least give drivers "an option" to use 0% ethanol. What do the folks with classic cars do in CA?
In Germany you got the 0%, 5% and 10% ethanol option. The 10% ethanol is actually a cheaper gas. I like that model... ppl who wanna save some money, their car doesn't suffer from 10% gas (Hyundai/Kia drivers) could just
PS. What part of ethanol is green is beyond me!
